Stripping and filling press



yJune 22,1926. Y 1,589,530

R. HoLz STRIPPING AND FILLING PRESS Filed April 30. 1923 'ff ff ril?! i! WAM Patented June 22., 1926.

sonar nom,

OF CINCINNATI, OHIO, ASSIGNOR '10 THE RICHARDSON COMPANY, OF

LOCKLAND, OHIO, A CORPORATION OF OHIO.

.s'rnrrrme Ani) FILLING rnnss.

Application mea April so, 1923. seria; No. 635,550.

M *invention relates t presses which fare emp oyed for forming various articles between male and female dies, andin which af stripping action is had, during-which the i molds may be filled, and subsequently a preliminary pressing action. In the production of battery boxes from a plastic material, I have evolved a process whereby the male and female parts are separable from the presses operating upon them, to the end that a cycle can be followed,'of first filling the female mold, then inserting and lining up the male dies, then transporting the assembled parts to another press for 15 imparting high pressure, and finally passthe assembled mold parts around through any other steps of treatment desired to the first press again, where the male parts are lifted and strlpped away from the female parts. A In this application I wish to'cover the filling and stripping press, by itself and in combination with a detachable mold.

Among other things, it is my object to provide in the press forna horizontally engaging and disengaging connectionv between 'the press and the mold parts. It is --also my object to provide a simple stripping mechanism, whereby the male part `is stripped l 7away from the article molded, and is lifted out of the female part or pushed out of it, or both, thereby insuring a perfect stripping of the article, without tearing it or distorting its shape. The above objects certain construction and arrangement I'o.

'ing

I accomplish by that parts to be hereinafter more specifically.

pointed out and claimed.

In the drawings :l

40 Figure 1 is a central vertical section takenthrough the device. vation of the device.

Referring to the press parts, I show a base 1, standards 2, 2, thereon, and a cylinder 3, in which isa hydraulic ram 4. `This ram controls the reciprocation of a plunger shaft 5. On the lower end of the cylinder surrounding the bushing 6, that defines the 1 'ournals for the haft 5,' is a depending housm0 7 which terminatesin an ori'fice 8, considerably larger than the shaft. The edges surrounding this openingl act as an abutment in the stri ping action of the press.

In the bed o the press is mounted a hy- Figure 2 is a front eledraulic ram 9, reciprocating in a cylinder 10,l and carrying a plunger shaft 11, which rises u into the female mold part through the hoi)J 11a in the bed to act as an ejector. I have not shown the connection and valves for a pressure medium' in my press, as these details form no part 'of my inven- On the bed of the press arey a pair of plates or some other convenient form of device providing a dovetail overhanging member 12 on each side of the top of the bed.

The lower end of the plunger shaft 5 is equipped with lahead 13, formed with a T- shaped downward projection 14, that is intended to engage the male die partsdetachably while themembers 12 engage the -female part.

As a -dieI have shown in Figure 2 asection of afemale die part, 13, a male die part having a head 14, anda plunger or plungers 15, and a stripper plate 16,'having dependingr webs 17 male die being provided with holes to slidthatv enter the female mold and surround the upper portions of ably engage v over said posts. The posts have `heads to prevent the malegdie from coming clear away from the stripper plate.

The lhead of the male die engages .the stripper plate by groove is formed in projection on the press shaft 5,. A

The posts 18 on the stripper plateJ are set so as to contact when drawn upwardly with the housing that surrounds the shaft 5, where it emerges from the upper'press cylinder.

As so constructed the prem is adapted to receive the mold or die parts, by sliding of the fiange 20 on the female part beneath the -oyerhanging members 12 on .the press bed,

and by lowering the shaft 5, so that at the same time the male zontally over the T-sh'aped end of said shaft J5. v i

The lifting of the shaft 5 will then cause the male die to rise, and if the article being` pressed has been closely engaged between the plungers-of'the male die, the article will contact therewith of its l overhangmg portions 19,.'andza T-shaped the upper portion of t this male 'die head, which fits the T-shaped die head will slide hori-`4r i rise with the male die, and the stripper plate will remain in its lowermost posltion, as shown in Figure 1. If the article does not come out with the male die .plungers, then the lowershaft 11 is raised. lThe female die is forned with a bottom section 21, which can be pushed upwardly through th said die, and this section is centered over the shaft 11, when the die is in position with the press shaft 5 in full engagement with the head of the male die. This actionwill force the article out, together with the male die and the stripper plate.

When the shaft 5 has been Withdrawn up-I wardly through part of its path, the ends of the posts on thestripperplate strike the web or Ahousing 7,v which results in a withdrawal of the plungers of the male part upwardly through the stri per late webs, until theshaft 5 has reac ed t e upward limit of its movement, which will be coincidental with the male die head Vreaching the heads on the ends of the stripper shaft posts.

The article adhering to the'plu'ngers of the male die will then be entirely stripped away therefrom, and will be lifted away by the operator. y

rIn case the male plunger slides out and up the through the stripper plate without lifting up this plate, then the article can be forced out by the lower hydraulic operated shaft, or as stated this shaft can be raised simultaneously with the raising of the upper shaft 5.

In any case the complete stripping of the article away from the mold parts land the lifting of it to a point of easy grasp'by the operator is provided for. f

When the male die and stripper plate are raised clear of the female` mold, and the movable section of the base of this female part is-lowered to its original position, a new filling. of material is inserted into the female part, and the action of the shaft 5 is reversed. v e5 As the shaft comes down carrying with it the male die and stripper plate, the plungers enter the mold and the plunger head strikes the stripper plate which is centered by hand, if necessary, so that it enters the die parts as set together moved along a' hori- 55 zontal path from the press.

The press may also be used f'or imparting the full pressure desired, and a succession vof molds broughtfin under the' press,

and thence passed around through a conveying, heating, or cooling system, so as to give the materials formed in the, dies sufficient. time 'to set. v

.I wish it understood that the features of my press involving the usual structures re- 6e" quired for any die press, lare described and illustrated merely to show any desired form of press, and not as limitations of the claim that follows. Also the particular method of engaging and disenga ng the die parts may be varied to suit condltions, without departing from my invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

In a device of the character described, the combination of a male die part, a female die part, anda press, having a bed, and a 'rec1procating plunger shaft, of means for removably mounting and retaining the female and the male die parts on the press bed, andthe shaft respectively, said mounting means being adapted to release both dieparts while in engagement with eachother, for the purpose described.l

- v ROBERT HOLZ. 

